body {
    background: linear-gradient(to right, #e0eafc, #cfdef3);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    width: 100%;
    max-width: 1400px;
    margin-bottom: 2rem;
    margin-top: 10rem;
}

.btn-submit {
    background: #4facfe;
    color: white;
    padding: 0.75rem;
    border-radius: 10px;
    transition: background 0.3s;
}

.btn-submit:hover {
    background: #00f2fe;
}